i had been using a 5d mkll but sold my canon gear recently. i was doing exposures of up to 900 seconds but around 200-400 seconds most of the time. i understand that the e5 will likely not out perform my canon set up but im interested to see if im able to use the e5 for long exposures with solid results?

the main reason im interested in the e5 is the 4/3 lenses (14-35mm f2 and 150mm f2).

also i have an omd em5 atm, would i just be better off buying the 43 lenses for it via an adaptor.